U.S. stocks were higher on Tuesday, lifted by strength in technology shares, but the S&P 500 and Nasdaq were on track for a negative month in September, Reuters reported. Major indexes fluctuated between positive and negative territory, with analysts citing concerns about the strength of the dollar but also seeking bargains following Monday's decline. Tech shares rose 0.6 percent after eBay Inc announced a plan to spin off its PayPal unit. The stock rose 7 percent to $56.33 and was the S&P's top percentage gainer on the day, as well as the most actively traded Nasdaq name. The U.S. dollar index rose 0.3 percent, off its peak of the session but still near four-year highs. For September, the Dow is up 0.2 percent, the S&P is down 1 percent and the Nasdaq is down 1.4 percent. For the third quarter, the Dow is up 1.8 percent, the S&P is up 1.2 percent and the Nasdaq is up 2.4 percent. Both the S&P and Nasdaq are on track for their seventh straight quarterly gain. The Dow Jones industrial average was rising 56.7 points, or 0.33 percent, to 17,127.92, the S&P 500 was gaining 5.43 points, or 0.27 percent, to 1,983.23 and the Nasdaq Composite was adding 10.49 points, or 0.23 percent, to 4,516.35.